On the Origin of the Color Shift in White-Emitting OLEDs

Malte Christian Gather, Ronald Alle, Heinrich Becker, Klaus Meerholz

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

White-emitting organic light-emitting diodes (OLEDs) notoriously suffer from brightness-dependent color shifts. Based on experimental data and fundamental considerations about charge-transport and trapping, a quantitative model is developed which gives insight into the origin of this shift and describes the experimental data extremely well. Having understood the major contribution to the spectral instability, a device architecture is designed that shows excellent color stability over a wide range of brightness levels.
Original languageEnglish
Pages (from-to)4460–4465
Number of pages5
JournalAdvanced Materials
Volume19
Issue number24
DOIs
Publication statusPublished - 28 Nov 2007

Keywords

  • Charge transport
  • Light-emitting diodes
  • White-light emitters

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